前寒武紀

Chinese

front, forepart; in front; past
front, forepart; in front; past; former; previous; last; before; preceding; earlier; ago; future; time ahead; first; top; battlefront; to move forward
 
trad. (前寒武紀) 寒武紀
simp. (前寒武纪) 寒武纪

Pronunciation


Proper noun

前寒武紀

  1. (geology) the Precambrian supereon (spanning from the formation of the Earth around 4.6 billion years ago to the emergence of hard-shelled creatures 541 million years ago)